Washington: Asserting that China has signed agreements for arms exports worth USD 11 billion from 2007 to 2011, the Pentagon has said that Pakistan remains Beijing's primary customer for conventional weapons.

"From 2007 to 2011, China signed approximately USD 11 billion in agreements for conventional weapons systems worldwide, ranging from general purpose material to major weapons systems," the Pentagon told the Congress in its annual report on China.

In 2012 and the coming years, China's arms exports will increase modestly as China's domestic defence industry improves, it said, adding that Chinese defence firms are marketing and selling arms throughout the world with the bulk of their sales to Asia and the Middle East/North Africa.

In 2012, China unveiled the Yi Long tactical unmanned aerial vehicle, which will probably be marketed to developing countries, it said.

"We describe in this report China's bilateral military interactions with other countries, including Pakistan. China has a very longstanding historical relationship with Pakistan, and it's one that we watch and we report on in this report," Deputy Assistant Secretary of Defence for East Asia David Helvey told reporters during a Pentagon news conference.

Helvey said the US is monitoring very carefully China's military modernization, the implications of that modernization both for opportunities to cooperate with China in a multinational or bilateral context, but also for potential implications for regional stability.

According to the report, Sub-Saharan African countries view China as a provider of low-cost weapons with fewer political strings attached compared to other international arms suppliers.

"China uses arms sales as part of a multifaceted approach to promote trade, secure access to natural resources, and extend its influence in the region," it said.